PT-2026-6627 · Pubsub · Pubsub

Andrew Fasano · Published 2026-02-05 · Updated 2026-02-05 · CVE-2026-1301

Positive Technologies (AI Summary)

CVSS v4.0

6.8

Medium

Base vector

AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Versions prior to 2026-1301

Description A specially crafted JSON message can cause a heap overflow in the PubSub JSON decoder before authentication. This can lead to a process crash and memory corruption. The issue occurs in builds with PubSub and JSON enabled.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-1301

Affected Products

Pubsub

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-1301 · Security Note
• https://twitter.com/VulmonFeeds/status/2019536512732344784 · Twitter Post
• https://cisa.gov/news-events/ics-advisories/icsa-26-036-03 · Note
• https://t.me/CVEtracker/43863 · Telegram Post